QI am using an ADF4350 in fractional mode (see attached *.pll file),but first
poor results for phase noise at 12,5kHz from the carrier and for fractional
Could you help me to improve phase noise in my design ?
AIn your settings the Modulus=768 and it is divisible by 2,3 or 6. Therfore,
spurs will occur at one sixth of Fpdf/MOD, 19.2MHz/(768*6) = 4.1666Mhz,
8.333Khz, 12.5Khz etc.
Therefore, reduce Modulus to say 25 and the spurs will ocurr at greater offsets
from the carrier frequency, in this case 19.2Mhz/25 = 768Khz.